Enhancement of the Bootstrap Current in a Tokamak Pedestal
Author(s)
Catto, Peter J.; Kagan, Grigory Alexandrovich
DownloadKagan-2010-Enhancement of the B.pdf (100.4Kb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
The strong radial electric field in a subsonic tokamak pedestal modifies the neoclassical ion parallel flow velocity, as well as the radial ion heat flux. Existing experimental evidence of the resulting alteration in the poloidal flow of a trace impurity is discussed. We then demonstrate that the modified parallel ion flow can noticeably enhance the pedestal bootstrap current when the background ions are in the banana regime. Only the coefficient of the ion temperature gradient drive term is affected. The revised expression for the pedestal bootstrap current is presented. The prescription for inserting the modification into any existing banana regime bootstrap current expression is given.
Date issued
2010-07Department
Massachusetts Institute of Technology. Plasma Science and Fusion CenterJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Kagan, Grigory, and Peter J. Catto. “Enhancement of the Bootstrap Current in a Tokamak Pedestal.” Physical Review Letters 105.4 (2010): 045002. © 2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007